Turning and planing tool



Mar. 27, 1923;

P 1,449,513 C. JAEGER TURNING AND PLANING TOOL and July 19, 1920Mina-80.9: inventor.- j Carl J" Eliot-neg;-

Patented Mar. 2?, 1923.

tlhillTiE ST cant JAEGER, or wnrnnor, NEAR MANNHEIM, GERMANY.

TURNING AND PLANING TOOL.

Application filed July 19, 1920. Serial No. 397,545.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. L,1313.)

To all whom it may concern:

Be it known that l, CARL JAEGER, director, a citizen of the GermanRepublic, and residing at Waldhof, near Mannheim, Ba-

5 den, Germany, have invented certain new and useful Improvements inTurning and Planing Tools (for which I have filed applications inGermany, Sept. 1, 1916; in

Austria, December 28, 1917 in Hungary, January 16, 1918; in Switzerland,April 5,

1919; in Sweden, April 9, 1919; in Denmark, May 17, 1919; in Norway, May27, 1919; in Holland, July 29, 1919; and Czechoslovakia, October 25,1919), of which the following is, a specification.

Turning and planing tools the central axis of which is arranged under anacute angle a with reference to the surface 6 to be worked upon, asshown by Figure 1, and in which only one cutting edge can be made use ofat a time, are well known in the art.

Turning and planing tools the front end, or better the frontal surfaceof which is provided with several cutting edges which when used up mustalways be worked up again, are equally known in the art. Neither are newsuch tools which are provided with a surface running all along the tooland having the most suitable inclination for turning purposes. The endsof these tools however must be ground in a special way.

Now the object of this invention, is to provide a tool possessing novelfeatures compared with the well known tools. In the accompanyingdrawings given by way of example- Fig. 1 shows a diagrammatical top planview of an ordinary turning tool.

Fig. 2 shows a perspective view of the improved tool.

Fig. 3 shows a view similar to Fig. 1.

The tool according to this invention has a cross section which isobtained by arranging the clearance angle 0 and the cutting an le 45 insuch a way, that they succeed eac other all around the cross section.The fundamental shape of the tool is therefore a prismatical shaft whichmay be rolled, drawn or worked and which has at each corneiof itscross-section a cutting edge running all along the length of the tool.It will be readily understood that the angles 0 and d may be variedaccording to requirements. come zero without the cutting angle d beingaltered for a given material. case the tool is simply supported in asuitable manner in the tool carrier so as to obtain the requiredadjusting angle.

In order to save weight or for the purpose of cooling or the like thecentre of the tool may be hollow.

Fig. 3 of the drawing shows how the improved tool is used. It ispositioned in such a'manner with reference to the piece of work, thatits axis is turned towards the left until the obtuse angle 6 is obtainedso that its cutting edge acts exactly as that of the well known toolFig. 1. The position of the ordinary tool shown by Fig. 1

has been repeated in dotted lines in Fig. 8.

My improved tool combines in one tool several times all the advantagesof any other well known type of turning tool; it may be used up withoutaltering in any way its shape until'only a short piece is left. It is byno means necessary to work up again and again at short intervals thefrontal face of the tool. Compared with a tool having only one cuttingedge running along its length, the improved tool has the great ad- Theclearance angle 0 can also bei In this.

vantage to secure a great saving of expensive steel and to enable thetool to be sharpened again by simply grinding the end face at rightangles with reference to the axis of the tool. Thus for instance a toolhaving four cutting edges running along its length and showing at oneend four right and at the other end four left cutting edges, replaceseight ordinary turnlng or planing tools each of which should have a andowing to the fact that the heat cannot be removed with sufiicientrapidity. When however four such tools are united as in the toolaccording to this invention the heaviest turning Work can be performedWithout difficulty.

Having thus particularly described the 5 nature of my invention What Iclaim as new and desire to secure by Letters Patent of the United Statesis:

In a turning and planing tool the combination with a prismatic shafthaving a longitudinal groove provided in each side of 10 the shaft andarranged, in; suqh a ay that the clearainceanfd cutting angles aI folmedateach edge of the shaft, substantially as and forthepurpqseset jort hIn testimony whereof I afli'X my signature. 15

CARL J AEGER.

